CCTV has been released after a man was attacked in a nightclub.
The assault happened in Savoy on Sauchiehall Street in Glasgow.
A 48-year-old man suffered serious facial injuries and was taken to hospital.
Police have released CCTV of a man they want to speak to as part of their investigation.
Constable Vicky Shanley said: “I would appeal to anyone who witnessed this incident or who recognises the man in the image to contact us as their information could assist with our investigation.
“There would have been lots of people out on Boxing Day night and therefore we would ask you to think back. Do you remember anything? Do you know the man in this image?”
Anyone with information is asked to contact 101.